The NG ITT PVS14 Third Generation Night Vision Monocular has a battery life of 50 hours and complies with the Military Standard 810 environmental requirements. The NG ITT PVS-14 Night Vision Monocular uses the same chassis as the US Military PVS models, and its battle-proven design is light-weight, tough and has superb optics. With variable gain control as standard, the NG ITT PVS-14 Gen3 Bravo Night Vision Monocular is compatible with a host of accessories allowing it to be hand held, head/helmet mounted, weapon or camera mounted. Designed for the most demanding night time Military or law enforcement operations, it is one of the best systems available. No need to worry about weather with the waterproof capabilities. With ergonomic, simple, easy-to use controls and built-in infrared illuminator and flood lens, the NG PVS14 Bravo Night Vision Monocular proves it is reliable, durable, and user-friendly.